ISO 26304:2025
Welding consumables — Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels — Classification
Welding consumables — Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels — Classification
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 21
- Дата публикации:
- 5 марта 2025 г.
- Издание:
- ISO IS 26304 edition 4 version 1
- ICS:
- 25.160.20
This document specifies requirements for classification of solid wire electrodes, tubular cored electrodes, and electrode-flux combinations (the all-weld metal deposits) in the as-welded condition and in the post-weld heat-treated condition for submerged arc welding of high strength steels with a minimum yield strength greater than 500 MPa or a minimum tensile strength greater than 570 MPa. One flux can be tested and classified with different electrodes. One electrode can be tested and classified with different fluxes. The solid wire electrode is also classified separately based on its chemical composition. This document is a combined specification providing for classification utilizing a system based on the yield strength and average impact energy of 47 J for the all-weld metal, or utilizing a system based on the tensile strength and average impact energy of 27 J for the all-weld metal. a) Clauses, subclauses and tables which carry the suffix “system A” are applicable only to solid wire electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based on the yield strength and the average impact energy of 47 J for the all-weld metal obtained with electrode-flux combinations in accordance with this document. b) Clauses, subclauses and tables which carry the suffix “system B” are applicable only to solid wire electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based on the tensile strength and the average impact energy of 27 J for the all-weld metal obtained with electrode-flux combinations in accordance with this document. c) Clauses, subclauses and tables which do not have either the suffix “system A” or “system B” are applicable to all solid wire electrodes, tubular cored electrodes and electrode-flux combinations classified in accordance with this document. For comparison purposes, some tables include requirements for electrodes classified in accordance with both systems, placing individual electrodes from the two systems, which are similar in composition and properties, on adjacent lines in the particular table. In a particular line of the table that is mandatory in one system, the symbol for the similar electrode from the other system is indicated in parentheses. By appropriate restriction of the formulation of a particular electrode, it is often, but not always, possible to produce an electrode that can be classified in both systems, in which case the electrode, or its packaging, can be marked with the classification in either or both systems. For system B only, electrode flux combinations for the single-run and two-run techniques are classified on the basis of the two-run technique.
Abstract
Overview
ISO 26304:2025 - "Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels - Classification" specifies how to classify filler materials used for submerged arc welding (SAW) of high‑strength steels. It applies to consumables and electrode‑flux combinations for steels with a minimum yield strength > 500 MPa or minimum tensile strength > 570 MPa, covering both the as‑welded and post‑weld heat‑treated conditions.
Keywords: ISO 26304:2025, welding consumables, submerged arc welding, high strength steels, solid wire electrodes, tubular cored electrodes, electrode‑flux combinations, classification.
Key topics and technical requirements
- Dual classification systems:
- System A - classification based on yield strength and an average impact energy of 47 J for all‑weld metal.
- System B - classification based on tensile strength and an average impact energy of 27 J for all‑weld metal.
- Scope rules: Solid wire electrodes are also classified by chemical composition; tubular cored wires and electrode‑flux combinations are classified by the all‑weld metal properties produced with specified fluxes.
- Interchangeability: One flux can be tested with multiple electrodes and one electrode with multiple fluxes, but interchangeability is only valid when verified per the standard.
- Testing and marks: The standard defines symbols and marking conventions for product/process, tensile and impact properties, flux type, chemical composition, post‑weld heat treatment, and optional hydrogen content.
- Test methods: Mechanical tests (multi‑run and two‑run techniques), chemical analysis, preheat/interpass control, rounding procedures, retest rules, and technical delivery conditions are specified.
- System B note: For system B, single‑run and two‑run techniques are classified on the basis of the two‑run technique.
Practical applications and users
ISO 26304:2025 is essential for:
- Welding consumable manufacturers classifying and labeling SAW electrodes and fluxes.
- Welding engineers and fabricators selecting consumables to match parent metal yield/tensile requirements.
- QA/QC inspectors and procurement teams ensuring specification compliance for high‑strength steel welding projects (pressure vessels, heavy equipment, structural members).
- Standards bodies and certification authorities harmonizing product specifications across markets.
Benefits include consistent product designation, clearer interchangeability rules for electrode/flux combinations, and improved selection of consumables for matching mechanical requirements.
Related standards (normative references)
- ISO 544, ISO 3690, ISO 6847, ISO 13916, ISO 14174, ISO 14344
- ISO 15792‑1:2020, ISO 15792‑2:2020, ISO 80000‑1:2022
Use ISO 26304:2025 to ensure accurate classification, testing, and selection of welding consumables for SAW of high‑strength steels.
Технические детали
- Технический комитет
- ISO/TC 44/SC 3 - Welding consumables
- SKU
- ISO 26304:2025
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